Our sweet little Baby Groot would've never.

Exactly one month in advance of "Avengers: Infinity War," Marvel released new footage in a mini trailer. Most of the trailer recycles scenes we've seen before. However, there are brand new sequences -- including a look at Iron Man's new suit, plus fresh shots of Gamora, Scarlet Witch, T'Challa, and Okoye.

But we're particularly fond of the scene around the :45 mark where Teen Groot back-talks Star-Lord:

Who knew "I am Groot" could be sarcastic?

Adolescent Groot has clearly aged from the adorable Baby Groot of "Guardians of the Galaxy Vol. 2," and this Groot is apparently the child of Vol. 1 Groot. (Just ask James Gunn to explain, this is his doing.)

"Infinity War" will be getting infinite promotion in the next month. There have been magazinecovers, new posters (minus the soul stone), new interviews, etc.

"Avengers 3" is reportedly 2 hours 36 minutes long, and will open in theaters April 27.

Want more stuff like this? Like us on Facebook.